<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><br></div><div style="-webkit-text-size-adjust: auto;">On Nov 7, 2013, at 4:11 PM, Andrew Dahl <<a href="mailto:droidjd@gmail.com">droidjd@gmail.com</a>> wrote:<br><br></div><blockquote type="cite" style="-webkit-text-size-adjust: auto;"><div><div dir="ltr">RAID-5 rotates the parity, yes.<br></div></div></blockquote><div><br></div><div>Right. The quote below gets RAID5 wrong; I just used it for the description of ZFS' parity scheme. </div><div><br></div><div><div><span style="-webkit-text-size-adjust: auto;"><a href="http://en.m.wikipedia.org/wiki/RAID">http://en.m.wikipedia.org/wiki/RAID</a></span></div><div><span style="-webkit-text-size-adjust: auto;"><br></span></div><div><span style="-webkit-text-size-adjust: auto;">FWIW, RAID4 uses a single parity disk. </span></div></div><div><br></div><blockquote type="cite" style="-webkit-text-size-adjust: auto;"><div><div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Nov 7, 2013 at 4:01 PM, Ryan Coleman <span dir="ltr"><<a href="mailto:ryanjcole@me.com" target="_blank">ryanjcole@me.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"><br>
On Nov 7, 2013, at 3:54 PM, Thomas Lunde <<a href="mailto:tlunde@gmail.com">tlunde@gmail.com</a>> wrote:<br>
<br>
> "Unlike RAID-5, RAID-Z doesn't use one specific drive for the parity, but it rotates the parity around different disks. This makes the system more efficient and prevents the parity disk from wearing out as fast."<br>
> <a href="http://superuser.com/questions/255783/zfs-raidz-parity" target="_blank">http://superuser.com/questions/255783/zfs-raidz-parity</a><br>
<br>
</div>Uhm… RAID-5 rotates the parity amongst the disks… right?</blockquote></div></div></div></div></blockquote></body></html>